刺激 (translations)→ appeal fillip stimulus whet
騒動 (translations)→ business commotion crisis dust-up fight fracas furor incident kerfuffle plate riot strife trouble
大騒ぎ (translations)→ fuss palaver roughhouse scrum tempest wild
泡 (translations)→ beads froth soap suds
泡立つ (translations)→ bubble frothy
きっかけ (translations)→ chance clue crowbar cue encouragement introduction lead occasion reason springboard timing tipping point turning point way